N Moyano, J Frydman, G Buldain, O Ruiz, R B Frydman
Facultad de Farmacia y BioquĂmica, Universidad de Buenos Aires, Argentina.
Journal of medicinal chemistry 1990 Jul1,4-Dimethylputrescine (2,5-hexanediamine) was separated into its racemic and meso isomers by fractional crystallization of its dibenzoyl derivative. The racemic form was resolved into its (+)- and (-)-isomers with (+)- and (-)-dibenzoyltartaric acids. None of the three isomers (meso, +, and -) inhibited ornithine decarboxylase (ODC) activity in vitro, while all the three were strongly inhibitory of ODC when assayed in vivo in rats or in H-35 hepatoma cells. In rat liver the three isomers also decreased the putrescine pool while only the (+)-isomer decreased spermidine content. In the H-35 cells the (-)- and (+)-isomers decreased the spermidine and spermine content. When ODC was induced in the latter by insulin it was found that the (-)-isomer strongly inhibited protein and ODC synthesis, while the (+)-isomer and the meso isomer were less inhibitory. The meso isomer was a good inducer of ODC antizyme in rat liver, while the (+)- and (-)-isomers were poor inducers of the former.
N Moyano, J Frydman, G Buldain, O Ruiz, R B Frydman. Inhibition of ornithine decarboxylase by the isomers of 1,4-dimethylputrescine. Journal of medicinal chemistry. 1990 Jul;33(7):1969-74
PMID: 2362277
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